<?php 
$servername = "127.0.0.1";
$username = "root";
$password = "";
$dbname = "stu_result";
$conn = new mysqli($servername,$username,$password,$dbname);
@mysqli_set_charset($conn,utf8);
if($conn ->connect_error) {
	die("连接失败：" . $conn ->connect_error);
}